Have to agree with Gerry, these are are very nicely made. As he says, the larger one will benefit from a little extra detail, like a hub in the centre and something to represent a rim, as it is a little flat without. Here is a pic of them which I hope will help give a sense of scale. These are straight from the pack, not had time to do anything with them yet.

Forgot about the Rim Here's a painted wheel with added rim and hub, paint scheme is Traditional Romany from what I can see from various wheel colour schemes on-line BUT without the red lining . Roughly 4x actual size